The singer, 23, showed off what looked like a diamond eternity ring in an Instagram post by raising her hand to her face. In the pic, she sticks out her tongue and wears a tank top featuring Seth Rogen's marijuana-smoking character from the 2008 comedy Pineapple Express. (Cyrus rocked a similar ring to the 2013 Billboard Music Awards.)

Miley Cyrus and Liam Hensworth arrived at Nobu in Malibu on July 23.Splash News Online

Hemsworth, 26, recently spoke out about their past split in an interview with GQ Australia. "Of course it was hard, man," he said. "But we were both going in different directions and it's just what needed to happen. We were both super young and it was a good decision at the time — we both needed that." The following month, he told News.com.au that his 2012 proposal wasn't impulsive and was a "well thought-out idea."

Since reuniting, the pair have been spotted out on several occasions together, notably Down Under spending time with Hemsworth's family in April. Last week, they made their relationship Instagram official with photos of each other on their personal accounts.

"So much love in one pic…" Cyrus captioned an Instagram pic of Hemsworth and his dog Dora on July 17. On July 18, Hemsworth posted a pic of Cyrus and his pet pig. "Just another day at the office," he quipped.